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https://www.readbyqxmd.com/read/29131779/sport-sampling-is-associated-with-improved-landing-technique-in-youth-athletes
#1
Lindsay J DiStefano, Eleanor M Beltz, Hayley J Root, Jessica C Martinez, Andrew Houghton, Nicole Taranto, Katherine Pearce, Erin McConnell, Courtney Muscat, Steve Boyle, Thomas H Trojian
BACKGROUND: Sport sampling is recommended to promote fundamental movement skill acquisition and physical activity. In contrast, sport specialization is associated with musculoskeletal injury risk, burnout, and attrition from sport. There is limited evidence to support the influence of sport sampling on neuromuscular control, which is associated with injury risk, in youth athletes. HYPOTHESIS: Athletes who participated in only 1 sport during the previous year would demonstrate higher Landing Error Scoring System (LESS) scores than their counterparts...
November 1, 2017: Sports Health
https://www.readbyqxmd.com/read/29130715/relationship-of-long-term-macronutrients-intake-on-anabolic-catabolic-hormones-in-female-elite-volleyball-players
#2
Juan Mielgo Ayuso, Michael C Zpurdos, Aritz Urdampilleta, Julio Calleja González, Jesús Seco, Alfredo Córdova
INTRODUCTION: Specific macronutrient distribution and training can alter acute and chronic hormone behavior and, subsequently, sport performance. OBJECTIVE: The main aim was to examine relationships between dietary intake and anabolic/catabolic hormone response in elite female volleyball players during a 29-week season. METHODS: Twenty-two elite female volleyballers (26.4 ± 5.6 years; 178 ± 9 cm; 67.1 ± 7.5 kg) had dietary intake (seven-day dietary recall and food frequency questionnaire), blood concentration of anabolic/catabolic hormones concentration, physical performance, and body composition assessed at four time points: a) T1: baseline/pre-testing; b) T2: eleven weeks after T1; c) T3: ten weeks after T2; and d) T4: eight weeks after T3...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29120989/validity-and-reliability-of-a-new-test-of-planned-agility-in-elite-taekwondo-athletes
#3
Helmi Chaabene, Yassine Negra, Laura Capranica, Raja Bouguezzi, Younés Hachana, Mohamed Ali Rouahi, Bessem Mkaouer
This study aimed to examine the validity, reliability, and sensitivity of a new test of planned agility in elite taekwondo athletes and to establish its relationship with sprint-time, jumping ability, and dynamic balance. Twenty-seven (20 males and 7 females) taekwondo athletes participated to this study. They performed taekwondo-specific agility test (TSAT) in two occasions (i.e., test-retest). Additionally, they performed jumping ability (i.e., squat jump, countermovement jump, standing long jump, and three-hop jump), sprint-time (5-m and 20-m dash), and dynamic balance (i...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29112051/a-comparison-of-the-effects-of-short-term-plyometric-and-resistance-training-on-lower-body-muscular-performance
#4
Malcolm T Whitehead, Timothy P Scheett, Michael R McGuigan, N Z Auckland, Angel V Martin
The purpose of this study was to compare effects of short-term plyometric and resistance training on lower body muscular performance. A convenience sample of thirty males aged 21.3 ± 1.8 years, height 177.3 ± 9.4 cm, mass 80.0 ± 2.6 kg, body fat 16.1 ± 1.2 % participated in this investigation. Participants were grouped and participated in progressive plyometric (PLT) or resistance training (SRT) twice per week for eight consecutive weeks or a control (CNT) group that did not participate in any training...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29093789/bone-mineral-density-and-physical-performance-of-female-patients-27-years-or-longer-after-surgery-for-adolescent-idiopathic-scoliosis
#5
Tsutomu Akazawa, Toshiaki Kotani, Tsuyoshi Sakuma, Takehide Katogi, Shohei Minami, Hisateru Niki, Yoshiaki Torii, Shigeta Morioka, Sumihisa Orita, Kazuhide Inage, Kazuki Fujimoto, Yasuhiro Shiga, Kazuhisa Takahashi, Seiji Ohtori
Study Design: Retrospective cohort study. Purpose: To assess bone mineral density (BMD) and bone metabolism ≥27 years after surgery in female patients who underwent spinal fusion for adolescent idiopathic scoliosis (AIS) during adolescence and to determine their associations with physical performance. Overview of Literature: There are no studies investigating postsurgical BMD in middle-aged AIS patients. Methods: This study included 23 patients who provided informed consent among 229 female patients with AIS who underwent spinal fusion from 1968 until 1988...
October 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29092472/a-new-dispersion-interferometer-on-hl-2a
#6
H X Wang, Y Zhou, Y Li, Y G Li, J Yi, Z C Deng, Z Gao, T Y Wu, Z J Yin, T Akiyama
In order to avoid a fringe jump caused by high plasma density and pellet injection [Y. Zhou et al., Rev. Sci. Instrum. 87, 11E107 (2016)], a new CO2 dispersion interferometer is designed and commissioned on HL-2A for average line-density measurement and density feedback control. The second harmonic technology in this system eliminates the phase shift caused by mechanical vibration. Signals are processed by a digital phase comparator and can be monitored in real time. A series of experiments are conducted to study the characteristics of the system such as a second harmonic coefficient and long-term stability...
October 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29079159/respiratory-syncytial-virus-and-other-noninfluenza-respiratory-viruses-in-older-adults
#7
REVIEW
Fumihiro Kodama, David A Nace, Robin L P Jump
Respiratory viral infections may cause serious complications for older adults, including residents of long-term care facilities (LTCFs). Although influenza is the most common cause of viral respiratory infections among older adults, several other respiratory viruses also cause significant morbidity and mortality, most notably respiratory syncytial virus. Other noninfluenza respiratory viral pathogens include human metapneumovirus, parainfluenza virus, rhinovirus, coronavirus, and adenovirus. All of these may cause outbreaks among LTCF residents...
December 2017: Infectious Disease Clinics of North America
https://www.readbyqxmd.com/read/29077708/let-s-jump-in-a-phylogenetic-study-of-the-great-basin-springfishes-and-poolfishes-crenichthys-and-empetrichthys-cyprinodontiformes-goodeidae
#8
D Cooper Campbell, Kyle R Piller
North America's Great Basin has long been of interest to biologists due to its high level of organismal endemicity throughout its endorheic watersheds. One example of such a group is the subfamily Empetricthyinae. In this paper, we analyzed the relationships of the Empetrichtyinae and assessed the validity of the subspecies designations given by Williams and Wilde within the group using concatenated phylogenetic tree estimation and species tree estimation. Samples from 19 populations were included covering the entire distribution of the three extant species of Empetricthyinae-Crenichthys nevadae, Crenichthys baileyi and Empetricthys latos...
2017: PloS One
https://www.readbyqxmd.com/read/29073841/individuals-post-achilles-tendon-rupture-exhibit-asymmetrical-knee-and-ankle-kinetics-and-loading-rates-during-a-drop-countermovement-jump
#9
Hayley C Powell, Karin Grävare Silbernagel, Annelie Brorsson, Roy Tranberg, Richard W Willy
Study Design Cross sectional, laboratory study. Background Asymmetrical knee loading has been reported in individuals post-Achilles tendon rupture during jogging and hopping. Yet, no studies have examined knee loads in individuals post-Achilles tendon rupture during high demand tasks, such as single limb landings. Objectives We sought to determine if individuals post-Achilles tendon rupture demonstrated asymmetrical knee loads and impact forces during drop countermovement jumps (Drop CMJ). Methods Achilles tendon length and single leg heel rise test for endurance were assessed in 34 individuals (31 male) 6...
October 26, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29065054/the-importance-of-body-composition-in-the-national-hockey-league-combine-physiologic-assessments
#10
Nathan A Chiarlitti, Patrick Delisle-Houde, Ryan E R Reid, Cory Kennedy, Ross E Andersen
The National Hockey League (NHL) combine was designed to assess draft-eligible players based on body composition, speed, power, and strength. The importance of body composition in the battery of combine physical tests was investigated and differences in results based on position were explored. Thirty-seven elite male Canadian university hockey players (age = 22.86 ± 1.55 years, weight = 87.21 ± 6.52 kg, height = 181.69 ± 6.19 cm) participated in the study at the beginning of their hockey season. All participants underwent physical testing (as outlined in the 2016 NHL combine) and one total body dual energy x-ray absorptiometry (DXA) scan to measure body composition...
October 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29063526/malaria-cases-in-switzerland-from-2005-to-2015-and-recent-rise-of-imported-plasmodium-vivax-malaria
#11
Gilles Eperon, Sophie Durieux-Paillard, Anne Mauris, François Chappuis, Nicole Gysin
Reporting cases of malaria to the Federal Office of Public Health has been mandatory in Switzerland since 1974. We analysed notifications of imported confirmed malaria cases between 2005 and 2015 in Switzerland or Liechtenstein. Data for previously visited countries, nationality and reason for travelling were analysed. In contrast with the impressive drop of malaria cases reported worldwide since 2000, we found that the number of malaria cases imported yearly in Switzerland doubled in 2014 and 2015 compared to the average for the preceding decade...
October 24, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/29063454/acute-effects-of-dynamic-stretching-on-muscle-flexibility-and-performance-an-analysis-of-the-current-literature
#12
REVIEW
Jules Opplert, Nicolas Babault
Stretching has long been used in many physical activities to increase range of motion (ROM) around a joint. Stretching also has other acute effects on the neuromuscular system. For instance, significant reductions in maximal voluntary strength, muscle power or evoked contractile properties have been recorded immediately after a single bout of static stretching, raising interest in other stretching modalities. Thus, the effects of dynamic stretching on subsequent muscular performance have been questioned. This review aimed to investigate performance and physiological alterations following dynamic stretching...
October 23, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29059895/consistency-of-surface-electromyography-assessment-at-lower-limb-selected-muscles-during-vertical-countermovement
#13
Carlos Rodrigues, Miguel Correia, Joao M C S Abrantes, Jurandir Nadal, Marco A Benedetti Rodrigues
Given the difficulty of invasive methods to assess muscle action during natural human movement, surface electromyography (sEMG) has been increasingly used to capture muscle activity in relation to kinesiological analysis of specific tasks. Isolated isometric, concentric and eccentric forms of muscle action have been receiving the most attention for research purposes. Nevertheless natural muscle action frequently involves the use of a preceding eccentric muscle action as a form of potentiation of immediate muscle concentric action, in what is designated as muscle stretch-shortening cycle (SSC)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059829/development-of-a-wearable-plantar-force-measurement-device-for-gait-analysis-in-remote-conditions
#14
Rawnak Hamid, Suharshani Wijesundara, Lachlan McMillan, David Scott, Jean-Michel Redoute, Peter R Ebeling, Mehmet Rasit Yuce
The pressure field that exists between the foot and the supporting surface is identified as the foot plantar pressure. The information obtained from foot plantar pressure measurements has useful applications that include diagnosis of gait disturbances, optimization of footwear design, sport biomechanics and prevention of injury. Using wearable technology to measure foot plantar pressure continuously allows the collection of comprehensive real-life data sets while interfering minimally with the subject's daily activities...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29052985/occurrence-loading-and-exposure-of-atmospheric-particle-bound-pops-at-the-african-and-european-edges-of-the-western-mediterranean-sea
#15
Javier Castro-Jiménez, Badreddine Barhoumi, Andrea Paluselli, Marc Tedetti, Begoña Jiménez, Juan Muñoz-Arnanz, Henri Wortham, Mohamed Ridha Driss, Richard Sempéré
A comparative study for 62 toxic chemicals based on the simultaneous monthly collection of aerosol samples during 2015-2016 in two coastal cities at both the African (Bizerte, Tunisia) and European (Marseille, France) edges of the Western Mediterranean basin is presented. Legacy polychlorinated biphenyls (∑18PCBs) and polychlorinated dibenzo-p-dioxins and dibenzofurans (∑17PCDD/Fs) show generally higher median levels at the African edge (2.1 and 0.2 pg m(-3), respectively) compared to the European coastal site (1...
November 3, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29045411/mating-induced-sexual-inhibition-in-the-jumping-spider-servaea-incana-araneae-salticidae-a-fast-acting-and-long-lasting-effect
#16
Vivian Mendez, Rowan H McGinley, Phillip W Taylor
Mating-induced sexual inhibition has been studied extensively as an important facet of many insect mating systems but remains little understood in spiders. Once mated, females of many spider species become unreceptive and aggressive toward males, but the speed of onset and persistence of this effect are not known. Addressing this gap, the present study considers (1) mating tendency of virgins, latency to remating, and lifetime mating frequency and (2) how quickly sexual inhibition is expressed after the first mating in female Servaea incana jumping spiders...
2017: PloS One
https://www.readbyqxmd.com/read/29035596/the-elevated-track-in-pole-vault-an-advantage-during-run-up
#17
Johan Cassirame, Hervé Sanchez, Jean Benoit Morin
Approach speed is a major determinant of pole-vault performance. Athletic jump events such as long jump, triple jump and pole vault can utilise an elevated track for the runway. Feedback from athletes indicates a benefit of using an elevated track on their results. However, there is no evidence that elevated tracks do increase athletes' performance. PURPOSE: The aim of this study is to investigate the potential advantage of using an elevated track during elite pole-vault competitions on run-up speed parameters...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035582/video-feedback-and-2-dimensional-landing-kinematics-in-elite-female-handball-players
#18
Anne Benjaminse, Wytze Postma, Ina Janssen, Egbert Otten
CONTEXT: In team handball, an anterior cruciate ligament injury often occurs during landing after a jump shot. Many intervention programs try to reduce the injury rate by instructing athletes to land more safely. Video is an effective way to provide feedback, but little is known about its influence on landing technique in sport-specific situations. OBJECTIVE: To test the effectiveness of a video-overlay feedback method on landing technique in elite handball players...
October 16, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29030644/how-to-prevent-the-detrimental-effects-of-two-months-of-bed-rest-on-muscle-bone-and-cardiovascular-system-an-rct
#19
Andreas Kramer, Albert Gollhofer, Gabriele Armbrecht, Dieter Felsenberg, Markus Gruber
Physical inactivity leads to a deconditioning of the skeletal, neuromuscular and cardiovascular system. It can lead to impaired quality of life, loss of autonomy, falls and fractures. Regular exercise would be a logical remedy, but the generally recommended high-volume endurance and strength training programs require a lot of time and equipment. In this randomized controlled study with 23 healthy participants, we established that a short, intensive jump training program can prevent the large musculoskeletal and cardiovascular deconditioning effects caused by two months of physical inactivity during bed rest, particularly the loss of bone mineral mass and density, lean muscle mass, maximal leg strength and peak oxygen uptake...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29023331/effects-of-plyometric-training-on-components-of-physical-fitness-in-prepuberal-male-soccer-athletes-the-role-of-surface-instability
#20
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Bessem Mkaouer, Younés Hachana, Urs Granacher
Negra, Y, Chaabene, H, Sammoud, S, Bouguezzi, R, Mkaouer, B, Hachana, Y, and Granacher, U. Effects of plyometric training on components of physical fitness in prepuberal male soccer athletes: the role of surface instability. J Strength Cond Res XX(X): 000-000, 2017-Previous studies contrasted the effects of plyometric training (PT) conducted on stable vs. unstable surfaces on components of physical fitness in child and adolescent soccer players. Depending on the training modality (stable vs. unstable), specific performance improvements were found for jump (stable PT) and balance performances (unstable PT)...
October 10, 2017: Journal of Strength and Conditioning Research
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